The “modern” hybrid dogs are definitely different than the “older” species dogs, visually. Genetically, no doubt.
Their lifespans/diseases comparison would be an interesting chart, but records on the older, species canines probably weren’t kept very carefully, and the article does mention more disease problems, probably indicating shorter lives for the new hybrids. Just guessing.
This is just anecdotal, but our well bred, expensive, good bloodlines Lab is a neurotic mess (albeit pretty), while our little mutt, a mix of breeds known fornervous behavior is smart, calm, and sweet. My husband said not only did he not know he could like a little dog, but she is his favorite dog ever.
bttt